Library for use on MS5803 devices
Dependents: MS5803-Demo mbed_PI_Depth robfish_pressuresensors_encoderQEI sensor_library_test ... more
MS5803.cpp@1:a1f3bd291a0c, 2014-07-24 (annotated)
- Committer:
- rkk
- Date:
- Thu Jul 24 04:47:54 2014 +0000
- Revision:
- 1:a1f3bd291a0c
- Parent:
- 0:d558dda1e821
- Child:
- 3:77cf75d8a6ce
adjusted library to make it more universal;
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
rkk | 0:d558dda1e821 | 1 | /* |
rkk | 0:d558dda1e821 | 2 | Permission is hereby granted, free of charge, to any person obtaining a copy |
rkk | 0:d558dda1e821 | 3 | of this software and associated documentation files (the "Software"), to deal |
rkk | 0:d558dda1e821 | 4 | in the Software without restriction, including without limitation the rights |
rkk | 0:d558dda1e821 | 5 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
rkk | 0:d558dda1e821 | 6 | copies of the Software, and to permit persons to whom the Software is |
rkk | 0:d558dda1e821 | 7 | furnished to do so, subject to the following conditions: |
rkk | 0:d558dda1e821 | 8 | |
rkk | 0:d558dda1e821 | 9 | The above copyright notice and this permission notice shall be included in |
rkk | 0:d558dda1e821 | 10 | all copies or substantial portions of the Software. |
rkk | 0:d558dda1e821 | 11 | |
rkk | 0:d558dda1e821 | 12 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
rkk | 0:d558dda1e821 | 13 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
rkk | 0:d558dda1e821 | 14 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
rkk | 0:d558dda1e821 | 15 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
rkk | 0:d558dda1e821 | 16 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
rkk | 0:d558dda1e821 | 17 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
rkk | 0:d558dda1e821 | 18 | THE SOFTWARE. |
rkk | 0:d558dda1e821 | 19 | |
rkk | 1:a1f3bd291a0c | 20 | * Library for Pressure Sensors of type MS5803-x of MEAS Switzerland (www.meas-spec.com). |
rkk | 1:a1f3bd291a0c | 21 | * The driver uses I2C mode (sensor's Protocol Select (PS) pin pulled to high). |
rkk | 1:a1f3bd291a0c | 22 | * MS5803-01BA was successfully tested by Raig Kaufer. |
rkk | 1:a1f3bd291a0c | 23 | * MS5803-14BA (Underwater Pressure Sensor 14 bar) was successfully tested by Robert Katzschmann |
rkk | 1:a1f3bd291a0c | 24 | * Other types of MEAS are compatible but not tested |
rkk | 1:a1f3bd291a0c | 25 | * Written by Raig Kaufer, distribute freely! |
rkk | 1:a1f3bd291a0c | 26 | * Revised by Robert Katzschmann |
rkk | 0:d558dda1e821 | 27 | */ |
rkk | 0:d558dda1e821 | 28 | |
rkk | 0:d558dda1e821 | 29 | #include <stdlib.h> |
rkk | 0:d558dda1e821 | 30 | #include "MS5803.h" |
rkk | 0:d558dda1e821 | 31 | |
rkk | 0:d558dda1e821 | 32 | |
rkk | 0:d558dda1e821 | 33 | /* |
rkk | 0:d558dda1e821 | 34 | * Sensor operating function according data sheet |
rkk | 0:d558dda1e821 | 35 | */ |
rkk | 0:d558dda1e821 | 36 | |
rkk | 0:d558dda1e821 | 37 | /* Send soft reset to the sensor */ |
rkk | 0:d558dda1e821 | 38 | void MS5803::MS5803Reset(void) { |
rkk | 0:d558dda1e821 | 39 | /* transmit out 1 byte reset command */ |
rkk | 0:d558dda1e821 | 40 | ms5803_tx_data[0] = ms5803_reset; |
rkk | 0:d558dda1e821 | 41 | if ( i2c.write( device_address, ms5803_tx_data, 1 ) ); |
rkk | 1:a1f3bd291a0c | 42 | printf("send soft reset"); |
rkk | 0:d558dda1e821 | 43 | wait_ms(20); |
rkk | 0:d558dda1e821 | 44 | } |
rkk | 0:d558dda1e821 | 45 | |
rkk | 0:d558dda1e821 | 46 | /* read the sensor calibration data from rom */ |
rkk | 0:d558dda1e821 | 47 | void MS5803::MS5803ReadProm(void) { |
rkk | 0:d558dda1e821 | 48 | uint8_t i,j; |
rkk | 0:d558dda1e821 | 49 | for (i=0; i<8; i++) { |
rkk | 0:d558dda1e821 | 50 | j = i; |
rkk | 0:d558dda1e821 | 51 | ms5803_tx_data[0] = ms5803_PROMread + (j<<1); |
rkk | 0:d558dda1e821 | 52 | if ( i2c.write( device_address, ms5803_tx_data, 1 ) ); |
rkk | 0:d558dda1e821 | 53 | if ( i2c.read( device_address, ms5803_rx_data, 2 ) ); |
rkk | 0:d558dda1e821 | 54 | C[i] = ms5803_rx_data[1] + (ms5803_rx_data[0]<<8); |
rkk | 0:d558dda1e821 | 55 | } |
rkk | 0:d558dda1e821 | 56 | } |
rkk | 0:d558dda1e821 | 57 | |
rkk | 0:d558dda1e821 | 58 | /* Start the sensor pressure conversion */ |
rkk | 0:d558dda1e821 | 59 | void MS5803::MS5803ConvertD1(void) { |
rkk | 0:d558dda1e821 | 60 | ms5803_tx_data[0] = ms5803_convD1; |
rkk | 0:d558dda1e821 | 61 | if ( i2c.write( device_address, ms5803_tx_data, 1 ) ); |
rkk | 0:d558dda1e821 | 62 | } |
rkk | 0:d558dda1e821 | 63 | |
rkk | 0:d558dda1e821 | 64 | /* Start the sensor temperature conversion */ |
rkk | 0:d558dda1e821 | 65 | void MS5803:: MS5803ConvertD2(void) { |
rkk | 0:d558dda1e821 | 66 | ms5803_tx_data[0] = ms5803_convD2; |
rkk | 0:d558dda1e821 | 67 | if ( i2c.write( device_address, ms5803_tx_data, 1 ) ); |
rkk | 0:d558dda1e821 | 68 | } |
rkk | 0:d558dda1e821 | 69 | |
rkk | 0:d558dda1e821 | 70 | /* Read the privious started conversion results */ |
rkk | 0:d558dda1e821 | 71 | int32_t MS5803::MS5803ReadADC(void) { |
rkk | 0:d558dda1e821 | 72 | int32_t adc; |
rkk | 0:d558dda1e821 | 73 | wait_ms(150); |
rkk | 0:d558dda1e821 | 74 | ms5803_tx_data[0] = ms5803_ADCread; |
rkk | 0:d558dda1e821 | 75 | if ( i2c.write( device_address, ms5803_tx_data, 1 ) ); |
rkk | 0:d558dda1e821 | 76 | if ( i2c.read( device_address, ms5803_rx_data, 3 ) ); |
rkk | 0:d558dda1e821 | 77 | adc = ms5803_rx_data[2] + (ms5803_rx_data[1]<<8) + (ms5803_rx_data[0]<<16); |
rkk | 0:d558dda1e821 | 78 | return (adc); |
rkk | 0:d558dda1e821 | 79 | } |
rkk | 0:d558dda1e821 | 80 | |
rkk | 0:d558dda1e821 | 81 | /* return the results */ |
rkk | 0:d558dda1e821 | 82 | float MS5803::MS5803_Pressure (void) { |
rkk | 0:d558dda1e821 | 83 | return P_MS5803; |
rkk | 0:d558dda1e821 | 84 | } |
rkk | 0:d558dda1e821 | 85 | float MS5803::MS5803_Temperature (void) { |
rkk | 0:d558dda1e821 | 86 | return T_MS5803; |
rkk | 0:d558dda1e821 | 87 | } |
rkk | 0:d558dda1e821 | 88 | |
rkk | 0:d558dda1e821 | 89 | /* Sensor reading and calculation procedure */ |
rkk | 0:d558dda1e821 | 90 | void MS5803::Barometer_MS5803(void) { |
rkk | 0:d558dda1e821 | 91 | int32_t dT, temp; |
rkk | 0:d558dda1e821 | 92 | int64_t OFF, SENS, press; |
rkk | 0:d558dda1e821 | 93 | |
rkk | 0:d558dda1e821 | 94 | MS5803Reset(); // reset the sensor |
rkk | 0:d558dda1e821 | 95 | MS5803ReadProm(); // read the calibration values |
rkk | 0:d558dda1e821 | 96 | MS5803ConvertD1(); // start pressure conversion |
rkk | 0:d558dda1e821 | 97 | D1 = MS5803ReadADC(); // read the pressure value |
rkk | 0:d558dda1e821 | 98 | MS5803ConvertD2(); // start temperature conversion |
rkk | 0:d558dda1e821 | 99 | D2 = MS5803ReadADC(); // read the temperature value |
rkk | 0:d558dda1e821 | 100 | |
rkk | 0:d558dda1e821 | 101 | /* calculation according MS5803-01BA data sheet DA5803-01BA_006 */ |
rkk | 0:d558dda1e821 | 102 | dT = D2 - (C[5]* 256); |
rkk | 0:d558dda1e821 | 103 | OFF = (int64_t)C[2] * (1<<16) + ((int64_t)dT * (int64_t)C[4]) / (1<<7); |
rkk | 0:d558dda1e821 | 104 | SENS = (int64_t)C[1] * (1<<15) + ((int64_t)dT * (int64_t)C[3]) / (1<<8); |
rkk | 0:d558dda1e821 | 105 | |
rkk | 0:d558dda1e821 | 106 | temp = 2000 + (dT * C[6]) / (1<<23); |
rkk | 0:d558dda1e821 | 107 | T_MS5803 = (float) temp / 100.0f; // result of temperature in deg C in this var |
rkk | 0:d558dda1e821 | 108 | press = (((int64_t)D1 * SENS) / (1<<21) - OFF) / (1<<15); |
rkk | 0:d558dda1e821 | 109 | P_MS5803 = (float) press / 100.0f; // result of pressure in mBar in this var |
rkk | 0:d558dda1e821 | 110 | } |